METAL BODY REPAIR - OD1653 - LESSON 2/TASK 2
this core. The diamond-shaped cell construction resembles the U-shaped cell
construction except that the ribbons zigzag in the same pattern as the fins,
thus creating diamond shaped air passages. The water passages between the
ribbons are irregular and therefore more efficient in cooling, but are more
easily clogged.
Each fin has many bumps and ridges, called deflectors,
which increase the cooling area exposed to the air.
Some honeycomb cores
have square cells.
The water has much farther to travel here than in a
diamond cell core, since the continuous water passages are alternately
vertical and horizontal rather than diagonal. The honeycomb type core has
several disadvantages. Although it exposes a large surface to the air, it
is rather frail, and its irregular passages clog easily.
Much of the
external surface of honeycomb radiators dispels heat indirectly and hence
loses effectiveness.
It is also difficult to manufacture metal ribbon of
the thinness used in honeycomb radiators without producing holes,
excessively thin pieces, or steel burrs that may rust out and cause leaks.